CVE-2026-33602

MEDIUM

Off-by-one access when processing crafted UDP responses

Title source: cna
STIX 2.1

Description

A rogue backend can send a crafted UDP response with a query ID off by one related to the maximum configured value, triggering an out-of-bounds write leading to a denial of service.

References (1)

Scores

CVSS v3 6.5
EPSS 0.0001
EPSS Percentile 0.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-122
Status published
Products (3)
PowerDNS/DNSdist 1.9.0 - 1.9.13
powerdns/dnsdist 1.9.0 - 1.9.13
PowerDNS/DNSdist 2.0.0 - 2.0.4
Published Apr 22, 2026
Tracked Since Apr 22, 2026